package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

/**
 * 执行修改操作
 */
public class Demo3 {
    public static void main(String[] args) throws Exception{
        //1.加载驱动(每种数据库驱动的类名和包名都是固定的)
        Class.forName("com.mysql.cj.jdbc.Driver");
        //2.
        Connection connection = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root","root");  //mysql是数据库名，改为tedu
        System.out.println("与数据库建立链接");
        //3.
        Statement statement = connection.createStatement();

        String sql = "UPDATE user " +
                     "SET password = '666666',nickname = '老三',age = 33 " +
                     "WHERE id = 1";
        int num = statement.executeUpdate(sql);
        if (num>0) {
            System.out.println("修改成功");
        } else {
            System.out.println("修改失败");
        }
        connection.close();
    }
}
